83 def getNthPairBounded(N,W=aleph0,H=aleph0,useDivmod=False):  argument
88     if W <= 0 or H <= 0:
90     elif N >= W*H:
94     if W is aleph0 and H is aleph0:
98     if H < W:
99         x,y = getNthPairBounded(N,H,W,useDivmod=useDivmod)
103         return N%W,N//W
110         cornerSize = base(W)
116             M = W*H - N - 1
119                 return (W-1-x,H-1-y)
124         index,offset = N%W,N//W
126         return (W-1-index, 1+offset+index)
127 def getNthPairBoundedChecked(N,W=aleph0,H=aleph0,useDivmod=False,GNP=getNthPairBounded):  argument
128     x,y = GNP(N,W,H,useDivmod)
129     assert 0 <= x < W and 0 <= y < H
132 def getNthNTuple(N, W, H=aleph0, useLeftToRight=False):  argument
138         elts = [None]*W
139         for i in range(W):
143         if W==0:
145         elif W==1:
147         elif W==2:
150             LW,RW = W//2, W - (W//2)
154 def getNthNTupleChecked(N, W, H=aleph0, useLeftToRight=False, GNT=getNthNTuple):  argument
155     t = GNT(N,W,H,useLeftToRight)
156     assert len(t) == W
206         W = len(active) - i
211         levelSize = W*H
213             idelta,delta = getNthPairBounded(N, W, H)
229     W = 3
233     for i in range(min(W*H,40)):
234         x,y = getNthPairBounded(i,W,H)
235         x2,y2 = getNthPairBounded(i,W,H,useDivmod=True)